Help!I Need Insurance!!!!!

I am starting a business as a
Children`s Party Coordinator.
I am looking for an insurance that is per-event. I only work part time
And my company is not yet large enough to have ongoing insurance.
The insurance would need to cover everything that may go wrong
From a child sticking a bean up their nose(from arts and
Crafts) to petting zoos, Bouncy castles and more. Can you give me
Some advise? Any advise on insurance would help!
Thanks